Atmega 128 fuse bits setting

[A.Rashad]

How do i program the fuse bits of atmega 128 for external crystal operation ? what values should i put for low and high fuse bits? how should i avoid locking of chip?

 

[skogsjanne]

Search atmel.com for application notes. There is plenty of information there.

 

[alexan_e]

see page of the 38 manual
http://www.google.gr/url?sa=t&rct=j...sg=AFQjCNF1FyKLlDP9rQorROi3E9F6yP2BUA&cad=rja

You should program CKOPT (set to 0)
Leave unprogrammed CKSEL3,2,1,0 (set to 1)

The SUT1,0 should be set to 01 or 10 or 11 (0=programmed, 1=unprogrammed) , default is 10

An easier solution would be to use Burn-O-Mat , I use the downloaded version with avrdude and USBasp
http://avr8-burn-o-mat.aaabbb.de/avr8_burn_o_mat_avrdude_gui_en.html

If you are using another application double check if the meaning of checked checkboxes is programmed or unprogrammed

Alex

---------- Post added at 10:08 ---------- Previous post was at 10:05 ----------

Search atmel.com for application notes. There is plenty of information there.

You could at least provide a link to a datasheet or a tutorial, I don't get this "find it yourself" kind of answer.